Nitrate 15n
Mostrando 13-24 de 157 artigos, teses e dissertações.
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13. Adubação nitrogenada em café decotado num latossolo de cerrado.
RESUMO: O nitrogênio (N) é um dos macronutrientes mais exigidos pelo cafeeiro. Sua utilização é necessaria para o cultivo nos solos de cerrado, pois estes não fornecem o nutriente em quantidades suficientes. Foi realizado um ensaio com o objetivo de estudar o efeito de fontes e doses de N no café decotado a 1,5 m de altura em 1997. O experimento foi i
Planaltina. Publicado em: 2011
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14. Herança e correlação entre caracteres de raiz e eficiência de uso do nitrogênio em milho / Inheritance and correlation between root traits and nitrogen use efficiency in maize
The efficiency of nitrogen fertilization in maize did not exceed 50%. Among the existing proposals to increase the efficiency of nitrogen use in maize stands the higher N uptake from the increase of the root system, especially in environments with low availability of N. The objectives of this work were to study the influence of nitrogen in the genetic variab
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/02/2010
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15. Atividade das enzimas nitrogenase e nitrato redutase em plantas de feijoeiro originadas de sementes com diferentes teores de molibdênio. / Activities of nitrogenase and nitrate reductase enzymes in common bean plants originating from seeds with different molybdenum concentrations
Sementes com elevadas concentrações de molibdênio (Mo) podem fornecer quantidades do nutriente suficientes para garantir adequado crescimento às plantas. Foram conduzidos um ensaio e dois experimentos com objetivo de avaliar o efeito do teor de Mo em sementes de feijoeiro (Phaseolus vulgaris L.) na assimilação do N do solo e na fixação biológica do
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/02/2010
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16. Meiotic chromosomes and nucleolar behavior in testicular cells of the grassland spittlebugs Deois flavopicta, Mahanarva fimbriolata and Notozulia entreriana (Hemiptera, Auchenorrhyncha)
Spittlebugs annually infest pastures and cause severe damage, representing a serious problem for the tropical American beef cattle industry. Spittlebugs are an important biotic constraint to forage production and there is a lack of cytogenetic data for this group of insects. For these reasons, we conducted this work, in which the spermatogenesis and nucleola
Genetics and Molecular Biology. Publicado em: 26/03/2010
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17. Anticoagulant activity in salivary gland homogenates of Thyrsopelma guianense (Diptera: Simuliidae), the primary vector of onchocerciasis in the Brazilian Amazon
In this study, anticoagulant activity was detected in salivary gland homogenates (SGHs) of Thyrsopelma guianense (Diptera: Simuliidae). The SGH yielded 1.07 μg ± 0.03 (n = 15) of total soluble protein per pair of glands. In addition, following SDS-PAGE (12.5% gel) and silver nitrate staining, 12 polypeptides with molecular weights ranging from 14-69 kDa we
Memórias do Instituto Oswaldo Cruz. Publicado em: 2010-03
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18. Isolation and characterization of a microorganism involved on autotrophic denitrification by sulfide oxidation in a vertical fixed-bed reactor / Isolamento e caracterização de microrganismo envolvido na desnitrificação autrófica pela oxidação de sulfeto em reator vertical de leito fixo
The aim of this study was to evaluate the community involved on autotrophic denitrification by sulfide oxidation applied to the post-treatment of anaerobic effluents. The enrichment of the bacterial community and autotrophic denitrifier community was accessed in three immobilized bed reactors operated at the conditions of autotrophic reduction of nitrate, au
Publicado em: 2010
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19. Utilização de sulfeto como doador de elétrons para a desnitrificação autotrófica aplicada ao tratamento de esgoto sanitário / Utilization of sulfide as electron donor in autotrophic denitrification applied to treatment of domestic sewage
The feasibility of autotrophic denitrification of effluent from anaerobic reactor treating domestic sewage using sulfide as electron donor was evaluated. Prior researches reveals sulfide into liquid phase of effluents and biogas can be utilized as electron donor for denitrification. However, information about the interaction between carbon, nitrogen and sulf
Publicado em: 2009
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20. Doses de nitrogênio e de enxofre para a recuperação de pastagem com capim-braquiária: atributos de parte aérea, raízes e fertilidade do solo / Nitrogen and sulfur rates for a Signal grass pasture recovery: forage aboveground and roots, and soil fertility attributes
Fertilizer application has been essential to pastures establishment, maintenance and recovery, whereas sulfur supply may be inadequate for grasses receiving high nitrogen rates. The objectives were to study the effects of combined nitrogen and sulfur rates in a degrading Signal grass (Brachiaria decumbens) pasture, by evaluating productive, morphological, ph
Publicado em: 2009
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21. Qualidade da água utilizada para consumo em escolas públicas municipais de ensino infantil de Ribeirão Preto - SP / Quality of water supplied for consumption in municipal public primary schools in Ribeirão Preto - SP.
Water is an essential element to life but can bring risks to human health if consumed with improper quality. Children are the most affected group with problems resulting from ingestion of contaminated water due to their vulnerability regarding to the immaturity of their immune system. In this context there is important a survey of water quality for consumpti
Publicado em: 2009
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22. Efecto del nitrato de potasio, fosfato de potasio y ethephon en la inducción floral de la feijoa o goiabeira serrana (Acca sellowiana [O. Berg] Burret)
The experiment was carried out in El Cortijo farm (La Vega, Cundinamarca, Colombia [ 04° 55' N and 74° 18' W ], 2350 m above sea level, 17° C average temperature, 1423 mm of annual precipitation, 85% of relative humidity, and 1.377 of sunshine hours/year). In the study, evaluation of foliar fertilizers KNO3 (potassium nitrate 13-0-46® 1%, 1.5%, and 2%),
Revista Brasileira de Fruticultura. Publicado em: 2008-09
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23. Perdas nitrogenadas e recuperação aparente de nitrogênio em fontes de adubação de capim elefante / Nitrogen losses and aparent recovery of nitrogen in sources of fertilization of elephant-gass
The efficiency of nitrogen fertilization is one of the key elements to grass production. The knowledge of nitrogen losses within this practice associated with the application of alternative nitrogen sources provide efficient use and flexibility in choosing between nitrogen fertilizers. The objective of this study was to evaluate nitrate leaching, ammonium vo
Publicado em: 2008
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24. Acúmulo e remobilização de NO3 - e eficiência de uso de nitrogênio em variedades tradicional e melhorada de arroz (Oryza sativa L.). / Accumulation and remobilization of NO3 - and efficiency in the use of nitrogen in traditional and improved varieties of rice (Oryza sativa L.).
The dynamics of accumulation and remobilization of NO3 -related protein content of the grains was studied in two varieties of rice, Piauí (traditional state of Maranhão) and IAC- 47 (enhanced by research institutions). The experiment was conducted in a greenhouse of UFRuralRJ in the period August 2006 to February 2007, with a completely randomized design w
Publicado em: 2008